Installing a zip file into blender

Hey guys,i need to install a zip file into blender,and this zip file is on my desktop,i checked back several times,it surely is,but if i press install from file,blender doesnt shows me the zip file,i can only see 2 icons,and that arent zip files,or parts of the zip file,what now? :P,thanks.

thanks to mic,is solved :).